commit ed159672eb3cd650a32b7e5cb4d5ec1fe0e63802
Author: Florian Weimer <fweimer@redhat.com>
Date:   Fri Apr 24 11:10:24 2015 +0200

    Do not build with -Winline
    
    -Winline causes architecture- and optimization-dependent build failures
    due to -Werror.  -Winline warns about inlining decisions based on
    branch hints, in effect preventing the use of inline functions in
    header files (because they might be called on unlikely branches, leading
    to a decision not to inline).
    
    The option was apparently added to the glibc build at a time when GCC
    did not support the always_inline attribute.  With current GCC versions,
    inlining failure for functions declared always_inline will receive a
    warning under -Wattributes, which is enabled by default, so -Winline
    appears unnecessary.

diff --git a/Makeconfig b/Makeconfig
index 6f61e4835c0a7770..b1bf7f24b6154e3d 100644
--- a/Makeconfig
+++ b/Makeconfig
@@ -639,9 +639,9 @@ endif
 
 # Extra flags to pass to GCC.
 ifeq ($(all-warnings),yes)
-+gccwarn := -Wall -Wwrite-strings -Winline -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
++gccwarn := -Wall -Wwrite-strings -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
 else
-+gccwarn := -Wall -Wwrite-strings -Winline
++gccwarn := -Wall -Wwrite-strings
 endif
 +gccwarn += -Wundef
 ifeq ($(enable-werror),yes)